Keo 906-000-249 Combo Drill Countersink No 16 Cobalt

Product Description

The KEO 906-000-249 is a combination drill and countersink designed to drill a pilot hole and cut a countersink in a single operation. Built from cobalt steel with a bright uncoated finish, it delivers the heat and wear resistance needed for harder workpiece materials. The tool features a 3/16 inch drill point, a 1/2 inch body diameter, and a bell-style cutting edge with a 60-degree included angle and a 118-degree drill point angle. At 3 inches overall length, it is sized for standard bench and hand-drill setups. Installed by machinists, toolmakers, and metalworking tradespeople, this countersink is suited for production and maintenance applications where consistent seat geometry is required.

This combo drill countersink is used in metalworking environments where fastener head seating is critical, including fabrication shops, maintenance repair operations, and manufacturing lines. The right-hand cut and double-end design make it compatible with standard drill presses, CNC machining centers, and hand drills running conventional clockwise rotation. Trade size No 16 fits common toolholder and chuck configurations used in both production and job-shop settings.

Key Features

• Cobalt steel construction provides enhanced heat resistance for harder ferrous and stainless materials
• Bell-style cutting edge with 60-degree included angle produces consistent countersink seat geometry
• 118-degree drill point angle for positive engagement on flat and curved workpiece surfaces
• Double-end configuration extends usable tool life
• Bright uncoated finish allows for easy visual inspection of cutting edge condition
• Right-hand cut for use with standard clockwise-rotation spindles

Compatibility

Designed for use in standard drill chucks and toolholders accepting a 1/2 inch body diameter shank, compatible with drill presses, CNC machining centers, and hand drills configured for right-hand rotation.

Installation Notes

Installation and use should be performed by qualified machinists or metalworking tradespeople familiar with cutting tool safety. Secure the workpiece firmly before operation and confirm the spindle is fully stopped before changing or inspecting the tool. Use appropriate cutting fluid for the workpiece material to manage heat buildup and extend tool life. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection.